Question

an urn contains 6 blue balls and 7 orange balls. in how many ways can we select 2 blue balls and 3 orange balls from the urn?

Answer 1

525

Explanation:

we use the combination function to solve this, we use it for each color and then multiply.

the first one would be 6C2=15

the second would be 7C3=35

so, the product is 15×35=525 ways